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Stockholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands				3 Months Ended		6 Months Ended		9 Months Ended
	Aug. 01, 2024	May 14, 2024	Apr. 01, 2024	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	May 07, 2024
Class of Stock [Line Items]
Shares purchased under share repurchase program (in shares)				6,348,435	0	9,279,177	4,793,857
Cash paid for shares repurchased				$ 374,935	$ 137	$ 545,905	$ 243,329
Common stock withheld under stock-based compensation agreements (in shares)						59,626	18,349
Dividends declared per common share (in USD per share)				$ 0.50	$ 0.45	$ 1.00	$ 0.90
Subsequent Event
Class of Stock [Line Items]
Dividends declared per common share (in USD per share)	$ 0.50
REH Company
Class of Stock [Line Items]
Shares purchased under share repurchase program (in shares)						7,864,761	1,969,279
August 2023 Share Repurchase Program
Class of Stock [Line Items]
Cash paid for shares repurchased								$ 785,800
Remaining authorized share repurchase amount								214,200
August 2023 Share Repurchase Program | REH Company
Class of Stock [Line Items]
Shares purchased under share repurchase program (in shares)			5,000,000
Price per share of stock repurchased (in USD per share)			$ 59.22
Cash paid for shares repurchased			$ 296,100
May 2024 Share Repurchase Program
Class of Stock [Line Items]
Authorized share repurchase amount								$ 1,000,000
Remaining authorized share repurchase amount				$ 925,000		$ 925,000
May 2024 Share Repurchase Program | REH Company
Class of Stock [Line Items]
Shares purchased under share repurchase program (in shares)		1,348,435
Price per share of stock repurchased (in USD per share)		$ 55.62
Cash paid for shares repurchased		$ 75,000

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